Paraffin device for treating threads



Sept. 13, 1932. A. HOFFMANN PARAFFIN DEVICE FOR TREATING THREADS Filed Deo. 21, 929

f l Ws sa F l I A* PatentedY Sept. 13, 1932 UNITED STATES PAT-,ENT OFFICE-,

AueUsr Borrar-Ammer' LEIPzrG, GERMANY y v PARAFFINmEvIcE ron 'rrtrifrriivdjrHREADsi Application filed` December 21, 1929, SerialNo vide the requiredV even rotation' of the paraffinv body and a consequent even application of parafin, as wellias a uniform tensioning ac-Y tion on the thread,'whereby unregular wind? ingand breaking ofthread is greatly elimif nated.

Another object of the invention is threpro- 2o vision of means to obtain a self-adjusting tensioning of. thethread in a manner-f that, at the commencement of the Vwinding opera'- tion, the tension is practically equal to zero, so that the thread mayfreelywind onto the reel or bobbin. Y

These andl other objects of the invention are obtained by the paraflin body being mounted upon its turning axle in a rigid, immovable relation thereto, but so-as to ren- 3D der both, the paraffin body and its turning pin capableof movement inaxialj direction; means being provided to thereby produce an even but variable pressure of the paraffin body on the thread. y

The accompanying drawing illustrates sev-k eral modifications ofthe invention by way of example. In the drawing Y Fig. 1 is a longitudinal section through a paraffin device according to the invention.

Fig. 2 is a front elevation thereof; Figs. 3, 4 and 5 are plan views, partlyin section, ofV modifiedl arrangements of theV pressure applying meansshownin Fig. 1.

Referring'tolFig; 1 a isthe'roller-'sh'aped paraffin body which is cast? to be rigid with 415,851, and in Germany septemter.y 16,1929. l

itsface plate VZ). The said face plate is provided with a central; boreythrough which; is passedthejthrea'ded end-d ofthe shaft d, a milled nut serving' vto hold the parts tof getherin mutually fixed relation. The' ten- 50 sioningV wheel g which is "arranged, to Work ,in conjunctionrwith the paraffin bodyfwi's vmounted` upon the shaft' Z by meansof a Akey yand keyway connection so as to always take part' in therotationfof the latter, but so that theshaft Z is able to bevdispla'ced'jin longitudinal Vdirection through the. Isaid wheel g. The hu'bgy ofthe wheel' gis pro'- vided with a circumferential groove l21 around which the thread to be 'treatedis'passed It is evident that for 'the` reasonofthe vmetallic face 'plate' b being securely'embedded .pinithefparalin substance, the parafiinV bodyQct a-ndthe tension wheel g arecausedL to rotate inunison, so` that thefparain. body' wears evenly 'alli over. its front surface "and rto there-V by effect an even tensioning or brakingaction' on the' thread; 1 1 y The-'rigid connection between the vpara'fn body a andi itsfsupportingf shaft renders' it V70 possible to sodevise'the parafn' apparatus, that at the lcmnmencement of the Vvwinding operationthel threadV passing'A between the body a andthe wheel g will bie subjected to little or norten'sion'-, which tension would only 75 progressivelybe caused to4 attain the desired strength.V This-'object may be arrivedatin V several ways; v

. In Fig; l', for example, the'sha'ft is ex@ tended and provided witha 'conveyor spiral 't adapted to' rotate in a cylindrical'I casing/le partially filled with a'rgranular substance, suchas shot m for example. lThe rotation of -theshafti al with its wormfconveyorhcauses the substancem to bemoved against the end '85 jwall ofthe casing vadjacent the jwheel g,

whilefat theV same time apullis exertedgonl the shaftd inthe oppositedirection: l TheMpiilling action' ontheshaft dV and,

therewith, the pressure betweeny the paraliin body a and the disc g may be altered by the i following means. A depending shaft lc is arranged in connection with the cylindrical casing k, within which a piston n may be moved up and down as by means of a screw spindle s.. The said shaft, like the casing k, is filled with granular material and, according to the position of piston n, more or less of the material will be allowed to remain in the casing' so that thespindle turns accordingly more or less deep within the said material and thus varies the pressure of the contact between the two members a and g.

Instead of the granular material a brush o,"

as shown in Fig. 3, o r any other-means' of resistance may be used to impede the rotation of the worm conveyor. I 1

As another alternative the cylindrical casing may partly be filled with a liquid which is moved by the worm z, and eventually conveyed to the spacebehind vthe worm through a tube p. By means of va cork, valveor the like, 1', the cross section of the tube maybe throttled or increased,so as to thereby alter the pressure between the members a andlg.

(Fig. 4.)

The arrangement illustrated in Fig. 5

` shows the shaft el vto be extended through the v4increasing the'pressure of the parafiin body on the'thread. A

f2.V A paraffinV device for treating thread, comprisingV a paraiiin body, a thread tensioning wheel, a longitudinally displacing' shaft, means on the shaft operative to thrust the ShataXially, and a metal plate at one end of theshaft and rotatable therewith to which the paraffin body is rigidly attached.

3. paraflin device for ,treating thread, Vcomprising av paraffin body, -a longitudinally 'displaceable'shafu a metal plate fixed to one end of said shaft and havingsaid paraffin `body fixed thereto, a thread tensioning wheel upon saidsha-ft adjacent the paraffin body, means; such as a key and keyway to render said shaft longitudinally displaceable in said tensioning wheel, va hub to said tensioning `wheel, a thread guiding groovecircumferencially arranged :in saidV hub, the thread thereby servingias a driving means to rotate said Jtensioning wheeltogether with .its shaft'and the paraiiin body rigidly attached thereto, and means on the shaftV operative to thrust the shaft axially. f

connection with the inner end of the shaft to produce a sliding movement, while rotating, of the shaft and the paraffin body attached thereto in the direction of the thread tensioning wheel. Y f

5. A paraffin device for` treating thread, comprising a casing, a shaft displaceably `supportedbyandpassing through said casing, a paraiiin body rigidly attached to the `external end of said' shaft, a thread tensioning wheel upon said shaft between the casing and the paraifin'body, a hub to vsaid tensioning wheeland a circumferential groove therein, a thread guided in said groove so as to thereby rotate the tensioning wheel and the shaft, conveyor means on the portion of the shaft in the casing, and material in the' casing which slightly obstructs kthe rotation of the shaft andtherebyrcauses a resilient pull on the shaft, and the paraiin body attached thereto, in the direction of the thread tensioning wheel. g

6. A paraiiin device for treating thread, comprising a casing, a shaft displaceably supported by and passing through said casing, a paraiiin bodyl rigidly attached to the external end of said shaft, a thread tensioning wheel upon said shaft between the casing andthe parafn body, a hub to saidtensioning wheel and a circumferential groove therein, a thread guided in said groove so as to thereby 2rotate the tensioning wheel and the shaft, conveyor means on the portion of the shaft in the casing, material inthe .casing which slightly obstructs the rotation of the shaft Vand. thereby Acauses aresilient Apull on the shaft,'andthe paraifn/body attached thereto, in the direction ofthe thread .tensioning wheel, and means to varygthe pull exerted onthe shaft and the paraffin .body attached thereto. A

7. A paraffin device kfor treating thread, comprising a casing, ka shaft. displaceably supported byand passing through said casing, a paraffin body rigidly attached to the external end of said shaft, a thread tension.'- ing wheel upon said shaft betweenthe casing -and the paraffin body, ahub to said tensioning wheel and circumferential groove therein, a thread guidedI in said Agroovesoas to thereby rotate the tensioning-wheel and the shaft, a .wo'rmfconveyor on the portion ofthe shaft within the casing, a depending shaftlike extension chamberiitted to said casing,

granular material in said casing and in the extension thereof-,and a 'movableipiston in the extension chambert regulate thel depth 

